CN105393591A

CN105393591A - Method, device and system for saving voice resource

Info

Publication number: CN105393591A
Application number: CN201480008344.5A
Authority: CN
Inventors: 吴晓波; 邹烨
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2016-03-09
Also published as: EP3142413A4; KR20170016939A; AU2014399228B2; JP2017519452A; AU2014399228A1; EP3142413A1; US10187836B2; US20170105156A1; WO2015196366A1

Abstract

Disclosed is a method for saving a voice resource. The method comprises: an MME sends a notification message to an evolved base station (eNodeB), the notification message being used for instructing the eNodeB not to hand over, for a non-voice service, a UE from a long term evolution (LTE) network to a circuit switched (CS) domain of a second generation (2G) or third generation (3G) network, or when an MSC determines that a circuit switched domain service is a non-voice service, the MSC sends a bearer release message to the base station to instruct the base station to release a voice resource. In the method for saving a voice resource provided in the present invention, it can be achieved, in a process of implementing a non-voice type service, that a UE is not triggered to hand over from an LTE network to a CS domain of a 2G or 3G network or the UE is triggered to hand over from the LTE network to the CS domain of the 2G or 3G network; and when the UE moves to the CS domain of the 2G or 3G network, a voice resource reserved in the CS domain of the 2G or 3G network is released.

Description

Method, device and system for saving voice resource

A kind of method, equipment and systems technology field for saving voice resource

The present invention relates to communication technical field, and in particular to a kind of method, equipment and the system of saving voice resource.Global system for mobile communications (Global System of Mobile communication, GSM) or WCDMA（Wideband Code Division Multiple Access, WCDMA) etc. the second generation (Second Generation, 2G) or third generation networks（Third Generation, 3G) network realizes comprehensive covering substantially.

With Long Term Evolution（Long Term Evolution, LTE) network technology development, these LTE network-covereds to some cities and traffic hot spot area, so in current communication network, LTE network and 2G or 3G network are simultaneously deposited.

User equipment（User Equipment, UE) during call, 2G or 3G network may be entered from LTE network, because LTE network is different from the carrier aircraft system of 2G or 3G network, it is necessary to from packet switch（Packet Switching, PS) domain is switched to circuit switching（Circuit Switching, CS) domain, it is possible that the interruption of audio call, so as to influence the continuity that user speech is called.

Circuit retracts（Circuit Switched Fallback, CSFB) for LTE cover under user equipment（User Equipment, UE) when handling speech business, UE first return back to the network with CS domains, in the network processes speech business with CS domains, has thus reached that the existing CS domains equipment of reuse to provide the purpose of traditional speech business for the user in LTE network.Prior art needs UE to be switched to the ps domain of 2G or 3G network from LTE network or be redirected to 2G or 3G network from LTE network, then initiates the connection in CS domains in 2G or 3G network again.

In the prior art, there is voice class CSFB and non-voice class CSFB during CSFB, but cause voice resource waste in non-voice class CSFB business procedures are realized in the prior art.

The content of the invention

For the above mentioned problem of prior art, the embodiment of the present invention provides a kind of method for saving voice resource, during non-voice class CSFB is realized, UE is not triggered and is switched to 2G or 3G network from LTE network CS domains, or triggering UE are switched to the CS domains of 2G or 3G network from LTE network, when the UE is moved to 2G or 3G network CS domains, discharge in the reserved voice resource in the CS domains of 2G or 3G network.The embodiment of the present invention additionally provides corresponding equipment and system.

First aspect present invention provides a kind of method for saving voice resource, including：

Mobile management entity MME receives the first paging request message for calling user device UE that moving exchanging center MSC is sent, and first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

According to first paging request message, the MME sends a notification message to evolution base station eNodeB, and the notification message is used for the circuit-switched CS domain for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service.

With reference in a first aspect, in the first possible implementation, the notification message includes the second configured information, second configured information is used to indicate the non-voice service.

With reference to first aspect or first aspect the first possible implementation, in second of possible implementation, methods described also includes：

The MME sends the second paging request message to the UE；

The MME receives the service request that the UE is sent, and the service request is used to be circuit domain business request circuit rollback CSFB.

Second aspect of the present invention provides a kind of method for saving voice resource, including：

The notification message that mobile management entity MME is sent is received positioned at the evolution base station eNodeB of Long Term Evolution LTE network, the notification message is used for the CS domains for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from the LTE network；

According to the notification message, the eNodeB sends to the MME and requires message from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network, or

The eNodeB sends to the UE and redirects request.With reference to second aspect, in the first possible implementation, the notification message includes the second configured information, and second configured information is used to indicate the non-voice service.

Third aspect present invention provides a kind of method for saving voice resource, including： Moving exchanging center MSC receives the first handover request message that mobile management entity MME is sent, and the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network；

The MSC sends the second handover request message to the base station of the 2G or 3G network, and the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The MSC receives the handoff completion message that the base station is sent；

The MSC judges whether the circuit domain business is non-voice service；

When the MSC judges the circuit domain business for non-voice service, the MSC sends carrying release message to indicate that the base station discharges the voice resource to the base station.

With reference to the third aspect, in the first possible implementation, methods described also includes：The service connection that the MSC receives the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The MSC judges whether the circuit domain business is non-voice service, including：

The MSC sets up request message according to the service connection and judges the circuit domain business for non-voice service.

With reference to the third aspect, in second of possible implementation, the MSC judges whether the circuit domain business is non-voice service, including：

The MSC judges the circuit domain business for non-voice service according to the type of the circuit domain business；

Methods described also includes：

The MSC sends service connection to the UE and sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

With reference to the third aspect, the third aspect the first or second of possible implementation, in the third possible implementation, methods described also includes：

When the MSC judges the circuit domain business for non-voice service, the MSC sends session release message to the UE, and the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

Fourth aspect present invention provides a kind of method for saving voice resource, including： User equipment (UE) positioned at Long Term Evolution LTE network is to mobile management entity MME transmission request message, and the request message is used to be circuit domain business request circuit rollback CSFB；

The UE receives the switching command that evolution base station eNodeB is sent, and the switching command is used to indicating that the UE to be sent to the information of the voice resource of the CS domains distribution of the 2G or 3G network for the circuit that the CSFB is switched to second generation 2G or third generation 3G network from the LTE network；

The UE sends handoff completion message to the base station of 2G or 3G network；

The UE receives the carrying release message that the base station is sent, and the carrying release message is used to indicate that the base station releases the voice resource.

With reference to fourth aspect, in the first possible implementation, after the UE sends handoff completion message to the base station of the 2G or 3G network, the UE is received before the carrying release message that the base station is sent, and methods described also includes：

The UE sends service connection to the MSC and sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service, or

The service connection that the UE receives the MSC transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

With reference to fourth aspect or fourth aspect the first possible implementation, in second of possible implementation, stating method also includes：

The UE receives the session release message that the MSC is sent, and the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

Fifth aspect present invention provides a kind of mobile management entity MME, including：

Receiving unit, the first paging request message for calling user device UE for receiving moving exchanging center MSC transmission, first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

Transmitting element, for first paging request message received according to the receiving unit, sent a notification message to evolution base station eNodeB, the notification message is used for the electricity for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service Road exchanges CS domains.

With reference to the 5th aspect, in the first possible implementation, the notification message includes the second configured information, and second configured information is used to indicate the non-voice service.With reference to the 5th aspect or the 5th aspect the first possible implementation, in second of possible implementation,

The transmitting element, is additionally operable to send the second paging request message to the UE；

The receiving unit, is additionally operable to receive the service request that the UE is sent, the service request is used to be circuit domain business request circuit rollback CSFB.

Sixth aspect present invention provides a kind of evolution base station eNodeB, including：

Receiving unit, notification message for receiving mobile management entity MME transmission, the notification message is used for the CS domains for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from Long Term Evolution LTE network；

Transmitting element, for the notification message received according to the receiving unit, sends to the MME and requires message from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network, or, sent to the UE and redirect request.

With reference to the 6th aspect, in the first possible implementation, the notification message includes the second configured information, and second configured information is used to indicate the non-voice service.

Seventh aspect present invention provides a kind of moving exchanging center MSC, including：

Receiving unit, the first handover request message for receiving mobile management entity MME transmission, the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network；

Transmitting element, for sending the second handover request message to the 2G or 3G network base station, the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The receiving unit, is additionally operable to receive the handoff completion message that the base station is sent；

Processing unit, for whether after the receiving unit receives the handoff completion message, it to be non-voice service to judge the circuit domain business；

The transmitting element, for when the processing unit judges the circuit domain business for non-voice service, sending carrying release message to the base station to indicate that the base station discharges the voice resource.

With reference to the 7th aspect, in the first possible implementation, The receiving unit, the service connection for being additionally operable to receive the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The processing unit, the service connection for being received according to the receiving unit sets up request message and judges the circuit domain business for non-voice service.

With reference to the 7th aspect, in second of possible implementation,

The processing unit, for judging the circuit domain business for non-voice service according to the type of the circuit domain business；

The transmitting element, is additionally operable to set up request message to UE transmission service connections, the service connection sets up request message and indicates that the circuit domain business is non-voice service.

With reference to the 7th aspect, the 7th aspect the first or second of possible implementation, in the third possible implementation,

The transmitting element, it is additionally operable to when the processing unit judges the circuit domain business for non-voice service, session release message is sent to the UE, the session release message is being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network for asking the UE to discharge the UE.

Eighth aspect present invention provides a kind of user equipment (UE) positioned at Long Term Evolution LTE network, including：Transmitting element, for sending request message to mobile management entity MME, the request message is used to be circuit domain business request circuit rollback CSFB;

Receiving unit, switching command for receiving evolution base station eNodeB transmissions, the switching command is used for the information for including the 2G in the circuit-switched CS domain for indicating that the UE is switched to second generation 2G or third generation 3G network for the CSFB from the LTE network, the switching command or 3G network is the voice resource that the UE is distributed from the LTE network switchings to the CS domains of the 2G or 3G network；

The transmitting element, is additionally operable to send handoff completion message to the base station；

The receiving unit, is additionally operable to receive the carrying release message that the base station is sent, the carrying release message is used to indicate that the base station releases the voice resource.

With reference to eighth aspect, in the first possible implementation,

The transmitting element, is additionally operable to after handoff completion message is sent to the 2G or 3G network base station, the receiving unit is received before the carrying release message that the base station is sent, is sent to the MSC Service connection sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service, or

The receiving unit, it is additionally operable to after the transmitting element sends handoff completion message to the base station, before the carrying release message for receiving the base station transmission, the service connection for receiving the MSC transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

With reference to eighth aspect or eighth aspect the first possible implementation, in second of possible implementation,

The receiving unit, is additionally operable to receive the session release message that the MSC is sent, the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

Ninth aspect present invention provides a kind of system for saving voice resource, including：

Mobile management entity MME, moving exchanging center MSC, evolution base station eNodeB;

The MME receives the first paging request message for calling user device UE that the MSC is sent, and first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

According to first paging request message, the MME sends a notification message to the eNodeB, and the notification message is used for the CS domains for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service；

The eNodeB receives the notification message that the MME is sent；

The eNodeB sends to the MME according to the notification message and requires message from the LTE network to the switching of 2G or the packet switched ps domain of 3G network, or

The eNodeB sends to the UE and redirects request.

Tenth aspect present invention provides a kind of system for saving voice resource,

Mobile management entity MME, moving exchanging center MSC, evolution base station eNodeB, the base station of second generation 2G or third generation 3G network；

User equipment (UE) positioned at Long Term Evolution LTE network is to MME transmission request messages, and the request message is used to be circuit domain business request circuit rollback CSFB; The MSC receives the first handover request message that the MME is sent, and the first handover request message is used for the circuit-switched CS domain for asking the MSC that the UE is switched to the 2G or 3G network for circuit domain business from the LTE network；

The MSC sends the second handover request message to the base station, and the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The UE receives the switching command that the eNodeB is sent, the switching command is used for the information for including the voice resource in the circuit-switched CS domain for indicating that the UE is switched to the 2G or 3G network for the CSFB from the LTE network, the switching command；

The UE sends handoff completion message to the base station；

The MSC judges whether the circuit domain business is non-voice service；

The embodiment provided by the present invention, the CS domains that UE is switched to 2G or 3G network from LTE network are not triggered in non-voice class circuit back off procedure is realized, or triggering UE is switched to the CS domains of 2G or 3G network from LTE network, when the UE is moved to 2G or 3G network CS domains, discharge in the reserved voice resource in the CS domains of 2G or 3G networks, so as to save voice resource.

Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment is briefly described, apparently, drawings in the following description are only some embodiments of the present invention, for those skilled in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is an embodiment schematic diagram of the method for saving voice resource in the embodiment of the present invention；

Fig. 2 a are another embodiment schematic diagrams of the method for saving voice resource in the embodiment of the present invention；Fig. 2 b are another embodiment schematic diagrams of the method for saving voice resource in the embodiment of the present invention；Fig. 3 is another embodiment schematic diagram of the method for saving voice resource in the embodiment of the present invention；Fig. 4 is another embodiment schematic diagram of the method for saving voice resource in the embodiment of the present invention；Fig. 5 is another embodiment schematic diagram of the method for saving voice resource in the embodiment of the present invention； Fig. 6 is another embodiment schematic diagram of the method for saving voice resource in the embodiment of the present invention；Fig. 7 is an embodiment schematic diagram of mobile management entity in the embodiment of the present invention；

Fig. 8 is an embodiment schematic diagram of evolution base station in the embodiment of the present invention；

Fig. 9 is an embodiment schematic diagram of mobile switching centre in the embodiment of the present invention；

Figure 10 is an embodiment schematic diagram of user equipment in the embodiment of the present invention；

Figure 11 is an embodiment schematic diagram of the system of saving voice resource in the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of method for saving voice resource, during non-voice class CSFB is realized, the CS domains that UE is switched to 2G or 3G network from LTE network are not triggered, or triggering UE is switched to the CS domains of 2G or 3G network from LTE network, when the UE is moved to 2G or 3G network CS domains, discharge in the reserved voice resource in the CS domains of 2G or 3G network.The embodiment of the present invention additionally provides corresponding equipment and system.It is described in detail individually below.

The present embodiments relate to section communication noun bilingual and abbreviation include：Mobile management entity（Mobile Managenment Entity, MME), evolution base station (Envolved NodeB, eNodeB), user equipment (User Equipment, UE), mobile switching centre（Mobile Services Switching Centre, MSC), the second generation or 3rd generation mobile communication technology（2rd Generation/3rd Generation, 2G or 3G), base station（Base Station, BS), the base station in the embodiment of the present invention include base station controller（Base Station Controller, BSC) and radio network controller（ Radio Network Controller, RNC);Long Term Evolution（Long Term Evolution, LTE), serving GRPS support node（Serving GPRS Support Node, SGSN), circuit retracts（Circuit Switched Fallback, CSFB), land radio access web（Terrestrial Radio Access Network, UTRAN), global system for mobile communications（Global System of Mobile communication, GSM), enhanced data rates for gsm evolution technology（EnhancedDataRateforGSMEvolution, EDGE) global system for mobile communications/enhanced data rates for gsm evolution technology Radio Access Network（ GSM / EDGE Radio Access Network, GERAN ).

First, second, third, fourth, 5th etc. in the embodiment of the present invention is only used for distinguishing different configured information, message or other objects, does not represent ordinal relation.

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those skilled in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Refering to Fig. 1, Fig. 1 be saved in the circuit rollback network switching of non-voice service in the embodiment of the present invention voice resource process and switching after active call process：

S100, UE send request of activating business to MME, and the request of activating business is used for request circuit rollback CSFB.

S 100a, MME may determine that whether LTE network and 2G or 3G network support that UE is switched to the CS domains of 2G or 3G network for CSFB from LTE network.

MME can also without judging, but it is default think that communication network is supported will be described for the CSFB

UE is switched to the CS domains of the 2G or 3G network from the LTE network, or only some networks therein are judged.

The communication network is the LTE network and the 2G or 3G network.

S 105, MME activate business request according to, sent a notification message to evolution base station eNodeB, the notification message is used for the CS domains for indicating that the UE is moved to 2G or 3G network for the CSFB by the eNodeB from LTE network, it is, notification message is used to indicate that the eNodeB should be moved to 2G or 3G network for UE described in the CSFB.

When MME judges that LTE network and 2G or 3G network support that the UE is switched to the CS domains of the 2G or 3G network for the CSFB from the LTE network, MME can inform that network is switched to the CS domains of 2G or 3G network by sending a notification message, so that eNodeB is initiated as the switching requirement that the UE is switched to the CS domains of 2G or 3G network by the CSFB from the LTE network.

For example, configured information can be included in the notification message, the CS domains of the logical 3G network are indicated using the configured information.

For example, the configured information can be single wireless voice calling continuity（Single radio voice call continuity, SRVCC) the configured information of switching, for indicating that the LTE network and 2G the or 3G network supports are that the UE is switched to the 2G or 3G network by the CSFB from the LTE network. Configured information in the embodiment of the present invention is properly termed as optimization CSFB and indicated（Optimized CSFB indicator), CSFB based on single wireless voice calling continuity (single radio voice call continuity, SRVCC) indicates（SRVCC based CSFB Indicator), enhanced CSFB indicate that (enhanced CSFB indicator) or enhancing CSFB possibilities indicate that (enhanced CSFB possible) or SRVCC operation possibilities indicate (SRVCC Operation possible).

S 110, eNodeB send switching to MME and require message.

The switching requires that message can be to require message from the LTE network to the switching of the packet switched ps domain of the 2G or 3G network,（For example：LTE to 2G or 3G PS HO Required message), or message is required from the LTE network to the switching of the CS domains of the 2G or 3G network,（For example：LTE to 2G or 3G SRVCC HO Required message）, or from the LTE network to the 2G or the ps domain of 3G network and the CS domains switching require message,（For example：G the or 3G SRVCC and PS HO Required message of LTE to 2).

The switching requires that message can include UE ability informations, for indicating band information, access capability that UE supported etc..For example, the UE ability informations can be at least one in 3 (classmark3) of class 2 (classmark2) of mark and class mark.In the prior art, when UE does not support that LTE network switches to the CS of 2G or 3G network, eNodeB will not issue UE ability information MME, therefore MME does not have UE ability information.But in MME after UE ability information is got, UE ability information can be sent to MSC by MME, so that MSC can go to 2G or 3G CS switchings.In embodiments of the present invention, UE ability informations can be passed to by MME by handover request message.

The switching requires that message package contains the first configured information, and first configured information is used to ask described

MME is the CS domains that the UE is switched to the 2G or 3G network by the CSFB from the LTE network；Or, first configured information is used to ask the MME that the UE is switched to the CS domains of the 2G or 3G network from the LTE network for the CSFB, and indicates that the UE is supported from the LTE network switchings to the 2G or 3G network CS domains；

Or, the switching requires message package containing source to target clear container, the source includes the second configured information to target clear container, and second configured information is used for the CS domains for asking the base station of the 2G or 3G network that the UE is switched to the 2G or 3G network for the CSFB from the LTE network.

First configured information is properly termed as CSFB and indicates, optimizes CSFB instructions, based on SRVCC's CSFB is indicated, enhanced CSFB is indicated or enhancing CSFB possibilities are indicated.

When the second configured information does not indicate that the UE supports to be switched to the 2G or 3G network CS domains from the LTE network, MME, which can give tacit consent to, thinks that the UE is supported.When the first configured information does not indicate that the UE supports to be switched to the 2G or 3G network CS domains from the LTE network, the base station of the 2G or 3G network, which can give tacit consent to, thinks that the UE is supported.Second configured information and first configured information are properly termed as CSFB and indicate, optimize CSFB instructions, the CSFB instructions based on SRVCC, enhanced CSFB instructions or enhancing CSFB possibility instructions.

For example, the second configured information can include CSFB indication fields, or CSFB indication fields and UE capable fields.CSFB indication fields indicate that UE is switched to the circuit-switched CS domain of the 2G or 3G network for the CSFB by the MME from the LTE network.UE capable fields represent that the UE supports to be switched to the ps domain of the 2G or 3G network from the LTE network.

First configured information can include CSFB indication fields, or CSFB indication fields and UE capable fields.UE is switched to the circuit-switched CS domain of the 2G or 3G network for the CSFB by the base station of the CSFB indication fields instruction 2G or 3G network from the LTE network.UE capable fields represent that the UE supports to be switched to the ps domain of the 2G or 3G network from the LTE network.

For example：

A) it is UTRAN networks for objective network, eNodeB includes second configured information in source RNC to Target RNC Transparent Container (source RNC to target RNC transparent container).CSFB indication fields can be used as by the use of CSFB information (CSFB information) fields of existing source RNC into Target RNC Transparent Container.Can be in source RNC to target

Increase a field in RNC transparent vessels and be used as UE capable fields.

B) it is GERAN networks for objective network, eNodeB is in old BSS to new BSS information（Old BSS to new BSS information) in include second configured information.CSFB indication fields or UE capable fields can be increased into new BSS information in old BSS.

S115, MME send the first handover request message to MSC, and the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network.

MSC, therefore the first handover request message are issued because the first handover request message is MME It is required that switching be from LTE network to 2G or the switching in the CS domains of 3G network, i.e., first handover request be PS to CS handover request.

The first handover request message can carry the 3rd configured information, and the 3rd configured information is used to ask CS domains, that is to say, that represent that first handover request sends for CSFB by the 3rd configured information.3rd configured information also can indicate that the UE supports to be switched to 2G the or 3G network Cs S domains from the LTE network.The first handover request message can not also indicate CSFB, and now MSC is default thinks that the first handover request sends for CSFB.

After MME receives UE ability information from eNodeB, the first handover request message can carry UE ability informations, for example, the ability information identifies at least one in classmark2 and class mark classmark3 for class.

Because UE does not support LTE network to the switching in 2G or 3G network CS domains, UE will not report the encoding and decoding speech information that it is supported, now MME can carry Default sound coding/decoding information according to the goal systems of switching in the first handover request message.

The 3rd configured information in first handover request message is properly termed as CSFB and indicates, optimizes CSFB instructions

(optimized CSFB indicator), based on single wireless voice calling continuity (single radio voice call continuity, SRVCC CSFB) indicates (SRVCC based CSFB Indicator), and enhanced CSFB is indicated（Enhanced CSFB indicator) or enhancing CSFB possibility instructions（enhanced CSFB possible) o

When carrying Session Hand-off number-single-receiver in the first handover request message（ Session Transfer

Number-Single Radio, STN-SR) when, the MSC ignores the STN-SR numbers.

S120, MME send the second handover request message to SGSN, and the second handover request message is used to ask the SGSN to initiate from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network.

UE from LTE network be switched to CS domains when, ps domain can be switched to simultaneously, ps domain is switched to when can also be different.This programme can so be reduced to network dependency degree, that is, only require that operator supports the CS domains switching of LTE to 2G or 3G network, without forcing operator to support the ps domain switching of LTE to 2G or 3G network. S121, MSC are to base station（BSC/RNC the 3rd handover request message) is sent, the 3rd handover request message is used to ask the base station to distribute voice resource for the circuit domain business.

The 3rd handover request message is additionally operable to the circuit-switched CS domain for asking the base station that user equipment (UE) is switched to the 2G or 3G network for CSFB from Long Term Evolution LTE network.Base station is the CS domains distribution CS domains resource that the UE is switched to the 2G or 3G network from LTE network.For example, the CS languages resource of base station distribution includes the Radio Resource between cable resource and base station and UE between base station and MSC.

For example, the 3rd handoff request message contains the 5th configured information, the 5th configured information is used to ask the base station that the UE is switched into the CS domains from the LTE network for the CSFB；

And/or, the 5th configured information is used for the switching for indicating that the UE supports the LTE network to the 2G or the CS domains of 3G network.

3rd handoff request message is containing source to target clear container, and the source to target clear container includes the 5th configured information.

When not including the encoding and decoding speech information that the UE is supported in the first handover request message, according to the 2G or 3G network type, the MSC sets the encoding and decoding speech information of acquiescence；

Wherein, the encoding and decoding speech information of the acquiescence may be embodied in the 3rd handover request message.3rd handoff request message contains integrity protection information（Integrity Protection Information) and/or power.Confidential information（Encryption Information), so that base station is after handoff completion message is received, safe mode command is sent to UE.

S125, base station send the 3rd handover request ack message to MSC, the information of CS domains Radio Resource is included in 3rd handover request ack message, the information of CS domains Radio Resource is used for the CS domains that the UE is switched to the 2G or 3G network from the LTE network.

S130, MSC send the information for including CS domains Radio Resource in the first switching response message, first switching response message to MME.

S135a, MME send switching to eNodeB and require response message, and the switching requires to include the information of CS domains Radio Resource in response message.

S135b, eNodeB send the information for including CS domains Radio Resource in switching command, the switching command to UE.

The UE receives the switching command that evolution base station eNodeB is sent, and the switching command is used to indicate institute The circuit-switched CS domain that UE is switched to 2G or 3G network for the CSFB from the LTE network is stated, it is described

The information of the voice resource of the C S domains distribution of 3 G networks.

For example：The switching command includes the 4th configured information, and the 4th configured information is used for the CS domains for indicating that the UE is switched to the 2G or 3G network for the CSFB from the LTE network.

For example：The information of ps domain resource is also included in the switching command, according to the information of the ps domain resource, the UE is switched to the ps domain of the 2G or 3G network from the LTE network.

The switching command may be used to indicate that the UE is switched to the ps domain of the 2G or 3G network from the LTE network.

S140, UE are switched to the CS domains of the 2G or 3G network from the LTE network according to switching command.

UE, using the information of the resource included in switching command, is the CS domains that the CSFB is switched to the 2G or 3G network from the LTE network.

UE generates session being switched to from the LTE network during the 2G or 3G network CS domains.UE can not also generate session being switched to from the LTE network during the 2G or 3G network CS domains.

When the packet encryption algorithm identification containing CS of the resource, the UE activates the encryption of CS domains according to the CS encryption algorithm identifications during the 2G networks or 3G network is switched to from the LTE network.

After the completion of S145, UE switching, to base station（BSC or RNC) send switching completion（HO Complete) message.

Base station is received after handoff completion message, to respond the handoff completion message, it is necessary in the UTRAN mobility informations sent to UE（UTRAN Mobility Information) middle carrying location area (Location Area Identity, LAI), UE launch positions are may result in the present embodiment updates (Location Area Update, LAU), so as to cause CS call setups to fail.To avert failure, base station can not carry location area in the UTRAN mobility informations sent to UE.

LAI can be sent to UE, for example, can use following methods by base station when subsequent process sends UTRAN mobility informations：

A) base station starts timer, waited after timer expiry, base station after handoff completion message is received UTRAN mobility informations are sent, LAI is sent to UE.Or,

B) base station receive calling IU release order（IU RELEASE COMMAND) or calling connection connect (Connect) message when, send UTRAN mobility informations, LAI is sent to UE.Wherein for caller, MSC sends calling connection and connects (Connect) message to UE;For being called, UE sends calling connection and connects (Connect) message to MSC.

Or, when UE sends LAU message to base station, to avert failure, base station does not send location update request message to the MSC, and base station directly transmits location updating and accepts message to the UE.

Handoff completion message in step S145 is transmitted to MSC by S150, base station.

MSC is received after the handoff completion message that the base station is sent, whether judge the circuit domain business is non-voice service, when the MSC judges the circuit domain business for non-voice service, the MSC sends carrying release message to indicate that the base station discharges the voice resource to the base station.

Specific deterministic process and the process of release voice resource can be understood refering to S155 ~ S196b.S155, UE send connection management service request, such as CM Serivce Request message to MSC.S160, MSC send authentication request (Authenticate Request) to UE.

This step S160 can not also be performed, i.e.,：The MSC does not send authentication request message to the UE.

S165, UE send Authentication Response (Authenticate Response) to MSC.

S170, MSC send safe mode command (Security mode command) to base station; integrity protection information (Integrity Protection Information) and/or power mouthful confidential information (Encryption Information) are carried, so that base station sends safe mode command to UE.

This step S170 can not also be performed, i.e.,：The MSC does not send safe mode command to the base station.

S175, base station send safe mode command to UE.Particularly, safe mode command of the base station in step S170, performs this step, or base station performs this step after S145 message is received.

S180, alternatively, MSC send connection management business to UE and taken orders.

S185, UE send service connection to MSC and set up request message, and the service connection, which sets up request message, to be used to ask the MSC to set up non-voice service, such as positioning service for the CSFB（Location Service, LCS) or unstructured supplementary data traffic (Unstructured Supplementary Service Data, USSD). Alternatively, it can also be that the service connection that the UE receptions MSC is sent sets up request message, the service connection sets up request message and indicates that the circuit domain business is non-voice service.

Alternatively, the service connection that the MSC receptions UE is sent sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The MSC judges whether the circuit domain business is non-voice service, can include：

Alternatively, the MSC judges whether the circuit domain business is non-voice service, can include：The MSC judges the circuit domain business for non-voice service according to the type of the circuit domain business；

Methods described can also include：

S190, MSC receive the service connection and set up after request or connection management service request, and the MSC sends session release message to UE（Such as Disconnect message）, the session release message is for asking the UE releases UE being switched to the session generated during the 2G or 3G network CS domains from the LTE network.

The UE receives the session release message that the MSC is sent, and the session release message is being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network for asking the UE to discharge the UE.

The UE is received after the session release message that the MSC is sent, and the UE sends session releasing request message（Such as Release message）.

The MSC is received after the session releasing request message, sends session releasing request completion message (such as Release complete message).

Alternatively, when the MSC judges the circuit domain business for non-voice service, the MSC sends session release message to the UE, and the session release message is being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network for asking the UE to discharge the UE.

S196a, MSC send base station of the carrying release message to the 2G or 3G network（ BSC/RNC ) , So that base station discharges in base station described in step S121 the voice resource in the CS domains for being the CS domains distribution that the UE is switched to the 2G or 3G network.

S196b, the 2G or 3G network base station send carrying release message to the UE, so that UE discharges the voice resource in the CS domains that the base station is the CS domains distribution that the UE is switched to the 2G or 3G network.

Further, off-hook is called, into talking state.

After end of calling, because the calling is triggered by CSFB, UE needs to return to after completing calling

LTE network.Base station determines that the calling is triggered by CSFB according to the 3rd handover request message, described

The base station of 2G or 3G network is after the call release message that the MSC is sent is received, the base station of the 2G or 3G networks UE is redirected to the LTE network, or, the UE is switched to the LTE network by the base station, and the call release message is release command Iu Release Command or clear command Clear Command.

It should be noted that in the present embodiment, base station can parse the CS signalings between UE and MSC.Base station receives the signaling message that UE is sent to MSC, the signaling message such as connection management service request, Authentication Response, the first CS calling connections set up request message.Base station can use the connection set up in the handoff procedure in the CS domains in LTE network to 2G or 3G network that the signaling message is sent into MSC, or the signaling message is sent into MSC using direct-sending message.

In the present embodiment, configured information, the first configured information, the second configured information, the 3rd configured information, the 4th configured information, the 5th configured information included in notification message can include CSFB indication fields, or CSFB indication fields and UE capable fields.CSFB indication fields indicate that UE is switched to the circuit-switched CS domain of the 2G or 3G network for the CSFB by the MME or described MSC or described 2/3G network base stations from the LTE network.UE capable fields represent the UE support from the LTE network be switched to the 2G or

The ps domain of 3G network.

In Fig. 1, the CS domains that UE is switched to 2G or 3G network from LTE network are triggered in non-voice class circuit back off procedure is realized, when the UE is moved to 2G or 3G network CS domains, discharge in the reserved voice resource in the CS domains of 2G or 3G network, so as to save voice resource.

Refering to Fig. 2 a, Fig. 2 a are passive calling procedure after the process of saving voice resource in the circuit rollback network switching of non-voice service in the embodiment of the present invention and switching： SOb-SOc:MSC sends CS paging requests to MME, MME triggering pagings.Alternatively, MSC sends beep-page message to MME, and the beep-page message indicates that this business is non-voice service, such as USSD or LCS business.

S200 and S200a is identical with S100 and SlOOa, will not be repeated here.

S205, MME send a notification message to evolution base station eNodeB, and the notification message is used for the CS domains for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service.

S210, the eNodeB send switching to the MME and require message, the switching require message be used for ask the UE be moved to the ps domain or the eNodeB of 2G or 3G network by redirecting flow by the UE from LTE network be moved to the 2G or 3G network.

The UE is moved to the 2G or 3G network by the eNodeB without using the handoff procedure in the CS domains that 2G or 3G network are moved to from LTE network, and the UE is moved to the 2G or 3G network by the switching or redirection flow using the ps domain that 2G or 3G network are moved to from LTE network.

In fig. 2 a, the CS domains that UE is switched to 2G or 3G network from LTE network are not triggered in non-voice class circuit back off procedure is realized, so as to save voice resource.

Refering to Fig. 2 b, Fig. 2 b are the passive calling procedure after the process of saving voice resource in the circuit rollback network switching of non-voice service in the embodiment of the present invention and switching：

S0b-S0c:MSC sends CS paging requests to MME, MME triggering pagings.

Alternatively, MSC sends beep-page message to MME, and the beep-page message indicates that this business is non-voice service, such as USSD or LCS business.

Step S200-S250 is identical with the step S100-S150 in Fig. 1, will not be repeated here.

S255, alternatively, UE send page response to MSC.

S260, MSC send authentication request to UE.

This step S260 can not also be performed, i.e.,：The MSC does not send authentication request message to the UE.S265, UE send Authentication Response to MSC.

S270, MSC send safe mode command to base station; integrity protection information (Integrity Protection Information) and/or power mouthful confidential information (Encryption Information) are carried, is pacified so that base station is sent Syntype order is to UE.

This step S270 can not also be performed, i.e.,：The MSC does not send safe mode command to the base station.

S275, base station send safe mode command to UE.Particularly, safe mode command of the base station in step S270, performs this step, or base station performs this step after S245 message is received.

S280, MSC send service connection to UE and set up request message, and the service connection, which sets up request message, to be used to ask the MSC to set up non-voice service, such as positioning service for the CSFB（Location Service, LCS) or unstructured supplementary data traffic (Unstructured Supplementary Service Data, USSD).

Alternatively, it can also be that the service connection that the UE receptions MSC is sent sets up request message, the service connection sets up request message and indicates that the circuit domain business is non-voice service.

Methods described can also include：

S290, the MSC are receiving handoff completion message or the MSC after transmission service connection sets up request message, and the MSC sends session release message to UE（Such as Disconnect message）, the session release message is for asking the UE releases UE being switched to the session generated during the 2G or 3G network CS domains from the LTE network.

The UE receives the session release message that the MSC is sent, and the session release message is used to ask the UE releases UE to be switched to during the 2G or 3G network CS domains from the LTE network The voice conversation of generation.

S296, MSC send carrying release message to BSC/RNC, and the CS domains distribution CS domains voice resource of the 2G or 3G network is switched to for the UE in base station described in step S221 to discharge.

The base station of the 2G or 3G network send carrying release message to the UE, discharge the CS domains distribution CS domains voice resource that the base station is switched to the 2G or 3G network for the UE.

LTE network.Base station is according to the 3rd handover request message, determine that the calling is triggered by CSFB, therefore, the base station of the 2G or 3G network are after the call release message that the MSC is sent is received, the base station of the 2/3G networks UE is redirected to the LTE network, or, the UE is switched to the LTE network by the base station, and the call release message is release command Iu Release Command or clear command Clear Command.

It should be noted that in the present embodiment, base station can parse the CS signalings between UE and MSC.Base station receives the signaling message that UE is sent to MSC, the signaling message such as confirming call message, Authentication Response, the 2nd CS calling connections set up request message.Base station can use the connection set up in the handoff procedure in the CS domains in LTE network to 2G or 3G network that the signaling message is sent into MSC, or the signaling message is sent into MSC using direct-sending message.

In the present embodiment, configured information, the second configured information, the 3rd configured information, the 4th configured information, the 5th configured information included in notification message can include CSFB indication fields, or CSFB indication fields and UE capable fields.CSFB indication fields indicate that UE is switched to the circuit-switched CS domain of the 2G or 3G network for the CSFB by the MME from the LTE network.UE capable fields represent that the UE supports to be switched to the ps domain of the 2G or 3G network from the LTE network.

During non-voice class CSFB is realized, the CS domains that UE is switched to 2G or 3G network from LTE network are not triggered, or triggering UE is switched to the CS domains of 2G or 3G network from LTE network, when the UE is moved to 2G or 3G network CS domains, discharge the CS domains reserved voice resource in 2G or 3G network So as to save valuable voice resource.

Describe the process of whole network switching and session in two above application scenarios in terms of two that UE callers and UE are called respectively.

Refering to Fig. 3, one embodiment of the method for saving voice resource provided in an embodiment of the present invention includes：What the 101st, mobile management entity MME reception moving exchanging center MSC was sent is used for calling user device

UE the first paging request message, first paging request message includes the first configured information, and first configured information is used to indicate non-voice service.

102nd, according to first paging request message, the MME sends a notification message to evolution base station eNodeB, and the notification message is used for the circuit-switched CS domain for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service.

Method shown in Fig. 3 also includes：

The MME sends the second paging request message to the UE；

MME above-mentioned process step and the detailed description of other process steps, may refer to the description in the embodiment corresponding to Fig. 2 a, here is omitted in the present embodiment.

Refering to Fig. 4, another embodiment of the method for saving voice resource provided in an embodiment of the present invention includes：201st, the evolution base station eNodeB positioned at Long Term Evolution LTE network receives the notification message that mobile management entity MME is sent, and the notification message is used for the CS domains for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from the LTE network.

202nd, according to the notification message, the eNodeB sends to the MME and requires message from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network, or, the eNodeB sends to the UE and redirects request.

The above-mentioned process step and the detailed description of other process steps of evolution base station, may refer to the description in the embodiment corresponding to Fig. 2 a, here is omitted in the present embodiment.

Refering to Fig. 5, another embodiment of the method for saving voice resource provided in an embodiment of the present invention includes：301st, moving exchanging center MSC receive mobile management entity MME send the first handover request message, the first handover request message be used for ask the MSC for circuit domain business by user equipment (UE) from Long Term Evolution LTE network is switched to the circuit-switched CS domain of second generation 2G or third generation 3G network.

302nd, the MSC sends the second handover request message to the base station of 2G or 3G network, and the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business.

303rd, the MSC receives the handoff completion message that the base station is sent.

304th, the MSC receives the handoff completion message that the base station is sent.

305th, when the MSC judges the circuit domain business for non-voice service, the MSC sends carrying release message to indicate that the base station discharges the voice resource to the base station.

Method shown in Fig. 5 also includes：

The service connection that the MSC receives the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

Methods described also includes：

UE above-mentioned process step and the detailed description of other process steps, may refer to the description in the embodiment corresponding to Fig. 1 and Fig. 2 b, here is omitted in the present embodiment.

Refering to Fig. 6, another embodiment of the method for saving voice resource provided in an embodiment of the present invention includes：

401st, the user equipment (UE) positioned at Long Term Evolution LTE network is to mobile management entity MME transmission request message, and the request message is used to be circuit domain business request circuit rollback CSFB.

402nd, the UE receives the switching command that evolution base station eNodeB is sent, and the switching command is used for Indicate that the UE is switched to the information that the voice resource that the 2G or 3G network are the CS domains distribution that the UE is switched to the 2G or 3G network from the LTE network is included in the circuit-switched CS domain of second generation 2G or third generation 3G network, the switching command for the CSFB from the LTE network.

403rd, the UE sends handoff completion message to the base station of G or 3G network.

404th, the UE receives the carrying release message that the base station is sent, and the carrying release message is used to indicate that the base station releases the voice resource.

Method shown in Fig. 6 can also include：

After the UE sends handoff completion message to the base station, the UE is received before the carrying release message that the base station is sent,

UE above-mentioned process step and the detailed description of other process steps, may refer to the description in the embodiment corresponding to Fig. 1 and Fig. 2 b, here is omitted in the present embodiment.Refering to Fig. 7, mobile management entity MME 60 provided in an embodiment of the present invention includes：Receiving unit 601 and transmitting element 602.

Receiving unit 601, the first paging request message for calling user device UE for receiving moving exchanging center MSC transmission, first paging request message includes the first configured information, and first configured information is used to indicate non-voice service.

Transmitting element 602, for first paging request message received according to the receiving unit 601, sent a notification message to evolution base station eNodeB, the notification message is used for the circuit-switched CS domain for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service. The transmitting element 602, is additionally operable to send the second paging request message to the UE；The receiving unit 601, is additionally operable to receive the service request that the UE is sent, the service request is used to be circuit domain business request circuit rollback CSFB.

The notification message includes the second configured information, and second configured information is used to indicate the non-voice service.

Mobile management entity in the present embodiment can perform the method and step of the MME described in Fig. 2 a and Fig. 3 embodiments of the method, and receiving unit 601 is used to receive the message that other entities are sent to MME, and transmitting element 602 is used to send message to other entities.Those skilled in the art can be according to Fig. 8 be referred in these embodiments of the method, evolution base station 70 provided in an embodiment of the present invention includes：Receiving unit 701 and transmitting element

702,

Receiving unit 701, notification message for receiving mobile management entity MME transmission, the notification message is used for the CS domains for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from Long Term Evolution LTE network.

Transmitting element 702, for the notification message received according to the receiving unit, sent to the MME and require message from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network, or, sent to the UE and redirect request.

Evolution base station in the present embodiment can perform the method and step of the evolution base station described in Fig. 2 a and Fig. 4 embodiments of the method, and receiving unit 701 is used to receive the message that other entities are sent to evolution base station.Those skilled in the art can be in these embodiments of the method execution step, understand the relation between the action of behavior and the execution of each unit and each unit in evolution base station.

Refering to Fig. 9, moving exchanging center MSC 80 provided in an embodiment of the present invention includes：Receiving unit 801, transmitting element 802 and processing unit 803.

Receiving unit 801, the first handover request message for receiving mobile management entity MME transmission, the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network. Transmitting element 802, for sending the second handover request message to the 2G or 3G network base station, the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；The receiving unit 801, is additionally operable to receive the handoff completion message that the base station is sent；

Processing unit 803, for whether after the receiving unit 801 receives the handoff completion message, it to be non-voice service to judge the circuit domain business；

The transmitting element 802, for when the processing unit 803 judges the circuit domain business for non-voice service, sending carrying release message to the base station to indicate that the base station discharges the voice resource.

The receiving unit 801, the service connection for being additionally operable to receive the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The processing unit 802, the service connection for being received according to the receiving unit 801 sets up request message and judges the circuit domain business for non-voice service.

The processing unit 803, for judging the circuit domain business for non-voice service according to the type of the circuit domain business；

The transmitting element 802, is additionally operable to set up request message to UE transmission service connections, the service connection sets up request message and indicates that the circuit domain business is non-voice service.

The transmitting element 802, it is additionally operable to when the processing unit 803 judges the circuit domain business for non-voice service, session release message is sent to the UE, the session release message is being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network for asking the UE to discharge the UE.

MSC in the present embodiment can perform the method and step of the MSC described in Fig. 1, Fig. 2 b and Fig. 5 embodiments of the method, and receiving unit 801 is used to receive the message that other entities are sent to MSC, transmitting element 803

Refering to Figure 10, user equipment 90 provided in an embodiment of the present invention includes：Transmitting element 901 and receiving unit 902.

Transmitting element 901, for sending request message to mobile management entity MME, the request message is used to be circuit domain business request circuit rollback CSFB.

Receiving unit 902, the switching command for receiving evolution base station eNodeB transmissions, the switching command For indicating that the UE is switched to the information of the voice resource for the CS domains distribution for being switched to the 2G or 3G network in the circuit-switched CS domain of second generation 2G or third generation 3G network, the switching command from the LTE network for the UE comprising the 2G or 3G network for the CSFB from the LTE network.

The transmitting element 901, is additionally operable to send handoff completion message to the base station of 2G or 3G network；The receiving unit 902, is additionally operable to receive the carrying release message that the base station is sent, the carrying release message is used to indicate that the base station releases the voice resource.

The transmitting element 901, it is additionally operable to after handoff completion message is sent to the base station, the receiving unit is received before the carrying release message of the base station transmission of 2G or 3G network, service connection, which is sent, to the MSC sets up request message, the service connection sets up request message and indicates that the circuit domain business is non-voice service, or

The receiving unit 902, it is additionally operable to after the transmitting element 901 sends handoff completion message to the base station, before the carrying release message for receiving the base station transmission, the service connection for receiving the MSC transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

The receiving unit 902, is additionally operable to receive the session release message that the MSC is sent, the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

UE in the present embodiment can perform the method and step of the UE described in Fig. 1, Fig. 2 b or Fig. 6 embodiments of the method, and receiving unit 902 is used to receiving the message that other entities are sent to UE, transmitting element 901 be used for

The said apparatus embodiment provided by the present invention, the CS domains that UE is switched to 2G or 3G network from LTE network are not triggered in non-voice class circuit back off procedure is realized, or triggering UE is switched to the CS domains of 2G or 3G network from LTE network, when the UE is moved to 2G or 3G network CS domains, discharge in the reserved voice resource in the CS domains of 2G or 3G network, so as to save voice resource.

It will be appreciated by those skilled in the art that in above-mentioned Fig. 7-10 embodiment, the transmitting element for sending message can be realized using transmitter, the receiving unit for receiving message can be realized using receiver.Or, transmitting element and receiving unit can be realized using transceiver.In physics realization, transmitter or Person's transceiver can be realized with a physical entity, can also be realized using multiple physical entities, and transmitter and transceiver can be realized using a physical entity, it would however also be possible to employ multiple physical entities realize that the present invention is without limitation.The unit of 1 processing unit 1 can realize that the present invention is without limitation using one or more processors.

Refering to Figure 11, an embodiment of network switching system provided in an embodiment of the present invention includes：Mobile management entity 60, evolution base station 70, mobile switching centre 80, base station 100 and user equipment 90;

Action and the interaction between them that mobile management entity 60, evolution base station 70, mobile switching centre 80, base station 100 and user equipment 90 are each performed, it may refer to Fig. 2 a description, and the description of Fig. 3, Fig. 4, Fig. 7, Fig. 8 embodiment of the method and device embodiment, here is omitted.

Or, action and the interaction between them that mobile management entity 60, evolution base station 70, mobile switching centre 80, base station 100 and user equipment 90 are each performed, it may refer to Fig. 1, Fig. 2 b description, and the description of Fig. 5, Fig. 6, Fig. 9, Figure 10 embodiment of the method and device embodiment, here is omitted.Those of ordinary skill in the art can be appreciated that, the unit and algorithm steps of each example described with reference to the embodiments described herein, it can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate the interchangeability of hardware and software, the composition and step of each example are generally described according to function in the above description.These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can realize described function to each specific application using distinct methods, but this realization is it is not considered that beyond the scope of this invention.It is apparent to those skilled in the art that, for convenience of description and succinctly, the specific work process of the system of foregoing description, device and unit may be referred to the corresponding process in preceding method embodiment, will not be repeated here.In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can realize by another way.For example, device embodiment described above is only schematical, for example, the division of the unit, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.In addition, shown or discussed coupling or direct each other Coupling or communication connection can be closed by indirect of some interfaces, device or unit or communication connection or electricity, mechanical or other form connections.

The part that unit is shown can be or may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Some or all of unit therein can be selected to realize the purpose of scheme of the embodiment of the present invention according to the actual needs.In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit or unit is individually physically present or two or more units are integrated in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or in use, can be stored in a computer read/write memory medium.Understood based on such, the part that technical scheme substantially contributes to prior art in other words, or all or part of the technical scheme can be embodied in the form of software product, the computer software product is stored in a storage medium, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（ROM, Read-Only Memory), random access memory（RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.The LTE network being previously mentioned in the present invention, including LTE A networks and subsequently it is likely to occur LTE versions.It is described above; only embodiment of the invention; but protection scope of the present invention is not limited thereto; any one skilled in the art the invention discloses technical scope in; various equivalent modifications or substitutions can be readily occurred in, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims

Claim

1st, a kind of method for saving voice resource, it is characterised in that including：

Mobile management entity MME receives the first paging request message for calling user device UE that moving exchanging center MSC is sent, and first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

According to first paging request message, the MME sends a notification message to evolution base station eNodeB, and the notification message is used for the circuit-switched CS domain for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service.2nd, according to the method described in claim 1, it is characterised in that the notification message includes the second configured information, second configured information is used to indicate the non-voice service.

3rd, method according to claim 1 or 2, it is characterised in that methods described also includes：The MME sends the second paging request message to the UE；

The MME receives the service request that the UE is sent, and the service request is used to be circuit domain business request circuit rollback CSFB.

4th, a kind of method for saving voice resource, it is characterised in that including：

The notification message that mobile management entity MME is sent is received positioned at the evolution base station eNodeB of Long Term Evolution LTE network, the notification message is used for the circuit-switched CS domain for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from the LTE network；

According to the notification message, the eNodeB sends to the MME and requires that message, or the eNodeB send to the UE and redirects request from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network.

5th, method according to claim 4, the notification message includes the second configured information, and second configured information is used to indicate the non-voice service. 6th, a kind of method for saving voice resource, it is characterised in that including：

Moving exchanging center MSC receives the first handover request message that mobile management entity MME is sent, and the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network；

The MSC sends the second handover request message to the base station of the 2G or 3G network, and the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The MSC receives the handoff completion message that the base station is sent；

The MSC judges whether the circuit domain business is non-voice service；

When the MSC judges the circuit domain business for non-voice service, the MSC sends carrying release message to indicate that the base station discharges the voice resource to the base station.

7th, method according to claim 6, it is characterised in that methods described also includes：The service connection that the MSC receives the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The MSC judges whether the circuit domain business is non-voice service, including：

The MSC sets up request message according to the service connection and judges the circuit domain business for non-voice service.

8th, method according to claim 6, it is characterised in that the MSC judges whether the circuit domain business is non-voice service, including：

The MSC judges the circuit domain business for non-voice service according to the type of the circuit domain business；

Methods described also includes：

The MSC sends service connection to the UE and sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

9th, according to any described method of claim 6-8, it is characterised in that methods described also includes：When the MSC judges the circuit domain business for non-voice service, the MSC is sent out to the UE Session release message is sent, the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

10th, a kind of method for saving voice resource, it is characterised in that including：

User equipment (UE) positioned at Long Term Evolution LTE network is to mobile management entity MME transmission request message, and the request message is used to be circuit domain business request circuit rollback CSFB；

The UE receives the switching command that evolution base station eNodeB is sent, and the switching command is used to indicating that the UE to be sent to the information of the voice resource of the CS domains distribution of the 2G or 3G network for the circuit that the CSFB is switched to second generation 2G or third generation 3G network from the LTE network；

The UE sends handoff completion message to the base station of 2G or 3G network；

The UE receives the carrying release message that the base station is sent, and the carrying release message is used to indicate that the base station releases the voice resource.

11st, method according to claim 10, it is characterised in that after the UE sends handoff completion message to the base station of the 2G or 3G networks, the UE is received before the carrying release message that the base station is sent, and methods described also includes：

The UE sends service connection to the MSC and sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service, or

The service connection that the UE receives the MSC transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

12nd, the method according to claim 10 or 11, it is characterised in that methods described also includes：The UE receives the session release message that the MSC is sent, and the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

13rd, a kind of mobile management entity MME, it is characterised in that including：

Receiving unit, is used for the of calling user device UE for receive moving exchanging center MSC transmission One paging request message, first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

Transmitting element, for first paging request message received according to the receiving unit, sent a notification message to evolution base station eNodeB, the notification message is used for the circuit-switched CS domain for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service.

14th, MME according to claim 13, it is characterised in that the notification message includes the second configured information, second configured information is used to indicate the non-voice service.

15th, the MME according to claim 13 or 14, it is characterised in that

The transmitting element, is additionally operable to send the second paging request message to the UE；

The receiving unit, is additionally operable to receive the service request that the UE is sent, the service request is used to be circuit domain business request circuit rollback CSFB.

16th, a kind of evolution base station eNodeB, it is characterised in that including：

Receiving unit, notification message for receiving mobile management entity MME transmission, the notification message is used for the CS domains for indicating that user equipment (UE) is not switched to second generation 2G or third generation 3G network by the eNodeB for non-voice service from Long Term Evolution LTE network；

Transmitting element, for the notification message received according to the receiving unit, sends to the MME and requires message from the LTE network to the switching of the 2G or the packet switched ps domain of 3G network, or, sent to the UE and redirect request.17th, eNodeB according to claim 16, it is characterised in that the notification message includes the second configured information, second configured information is used to indicate the non-voice service.

18th, a kind of moving exchanging center MSC, it is characterised in that including: Receiving unit, the first handover request message for receiving mobile management entity MME transmission, the first handover request message is used for the circuit-switched CS domain for asking the MSC that user equipment (UE) is switched to second generation 2G or third generation 3G network for circuit domain business from Long Term Evolution LTE network；

Transmitting element, for sending the second handover request message to the 2G or 3G network base station, the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The receiving unit, is additionally operable to receive the handoff completion message that the base station is sent；

Processing unit, for whether after the receiving unit receives the handoff completion message, it to be non-voice service to judge the circuit domain business；

The transmitting element, for when the processing unit judges the circuit domain business for non-voice service, sending carrying release message to the base station to indicate that the base station discharges the voice resource.

19th, MSC according to claim 18, it is characterised in that

The receiving unit, the service connection for being additionally operable to receive the UE transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service；

The processing unit, the service connection for being received according to the receiving unit sets up request message and judges the circuit domain business for non-voice service.

20th, MSC according to claim 18, it is characterised in that

The processing unit, for judging the circuit domain business for non-voice service according to the type of the circuit domain business；

The transmitting element, is additionally operable to set up request message to UE transmission service connections, the service connection sets up request message and indicates that the circuit domain business is non-voice service.

21st, according to any described MSC of claim 18-20, it is characterised in that

The transmitting element, it is additionally operable to when the processing unit judges the circuit domain business for non-voice service, session release message is sent to the UE, the session release message is being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network for asking the UE to discharge the UE. 22nd, a kind of user equipment (UE) positioned at Long Term Evolution LTE network, it is characterised in that including：Transmitting element, for sending request message to mobile management entity MME, the request message is used to be circuit domain business request circuit rollback CSFB;

Receiving unit, switching command for receiving evolution base station eNodeB transmissions, the switching command is used in the circuit-switched CS domain for indicating that the UE is switched to second generation 2G or third generation 3G network for the CSFB from the LTE network, the switching command information for including the voice resource that the 2G or 3G network are circuit-switched CS domain distribution of the UE from the LTE network switchings to the 2G or 3G network；

The transmitting element, is additionally operable to send handoff completion message to the base station of 2G or 3G network；The receiving unit, is additionally operable to receive the carrying release message that the base station is sent, the carrying release message is used to indicate that the base station releases the voice resource.

23rd, user equipment according to claim 22, it is characterised in that

The transmitting element, it is additionally operable to after handoff completion message is sent to the 2G or 3G network base station, the receiving unit is received before the carrying release message that the base station is sent, service connection, which is sent, to the MSC sets up request message, the service connection sets up request message and indicates that the circuit domain business is non-voice service, or

The receiving unit, it is additionally operable to after the transmitting element sends handoff completion message to the base station, before the carrying release message for receiving the base station transmission, the service connection for receiving the MSC transmissions sets up request message, and the service connection sets up request message and indicates that the circuit domain business is non-voice service.

24th, the user equipment according to claim 22 or 23, it is characterised in that

The receiving unit, is additionally operable to receive the session release message that the MSC is sent, the session release message is for asking the UE releases being switched to the voice conversation generated during the 2G or 3G network CS domains from the LTE network.

25th, a kind of system for saving voice resource, it is characterised in that including：Mobile management entity MME, Moving exchanging center MSC, evolution base station eNodeB；

The MME receives the first paging request message for calling user device UE that the MSC is sent, and first paging request message includes the first configured information, and first configured information is used to indicate non-voice service；

According to first paging request message, the MME sends a notification message to the eNodeB, and the notification message is used for the CS domains for indicating that the eNodeB is not switched to the UE from Long Term Evolution LTE network second generation 2G or third generation 3G network for the non-voice service；

The eNodeB receives the notification message that the MME is sent；

The eNodeB sends to the MME according to the notification message and requires message from the LTE network to the switching of 2G or the packet switched ps domain of 3G network, or

The eNodeB sends to the UE and redirects request.

26th, a kind of system for saving voice resource, it is characterised in that including：Mobile management entity MME, moving exchanging center MSC, evolution base station eNodeB, the base station of second generation 2G or third generation 3G network；User equipment (UE) positioned at Long Term Evolution LTE network is to MME transmission request messages, and the request message is used to be circuit domain business request circuit rollback CSFB；

The MSC receives the first handover request message that the MME is sent, and the first handover request message is used for the circuit-switched CS domain for asking the MSC that the UE is switched to the 2G or 3G network for circuit domain business from the LTE network；

The MSC sends the second handover request message to the base station, and the second handover request message is used to ask the base station to distribute voice resource for the circuit domain business；

The UE receives the switching command that the eNodeB is sent, the switching command is used for the information for including the voice resource in the circuit-switched CS domain for indicating that the UE is switched to the 2G or 3G network for the CSFB from the LTE network, the switching command；

The UE sends handoff completion message to the base station；

The MSC receives the handoff completion message that the base station is sent；

The MSC judges whether the circuit domain business is non-voice service；

When the MSC judges the circuit domain business for non-voice service, the MSC is to the base station Carrying release message is sent to indicate that the base station discharges the voice resource.